Telegeaph



(No Model.)

0. L. HEALY.

PRINTING TELEGRAPH.

No. 341,655. Patented May 11, 1886.

UNITED STATES PATENT OFFICE.

CLARENCE L. HEALY, OE BROOKLYN, ASSIGNOR TO THE COMMERCIAL TELEGRAM COMPANhZ-OF NEW YORK, N. Y.

PRINTING-TELEGRAPH.

$PECIPICA'IION forming part of Letters Patent No. 341,655, dated May 11, 1886.

Application filed February 9, 1886. Serial No. 191,279.

To all whom it may concern:

Be it known that I, CLARENCE L. HEALY, of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Printing-Telegraphs, of which the following is a specification.

My invention relates to that class of printing-telegraphsemployingprintersorreceivers, wherein the printing or press magnets are in cludedin the same circuit with the type wheel magnets, and are energized by the prolongation of the current when the transmitter is brought to a stop. Heretofore in such inachines the press-magnet remained active during the entire time that the key at transmitter was continued to be depressed by the operator after the printing had been effected, and the pressroller continued to hold the tape against the type-wheel until released by the act of the operator, causing a loss of speed and blurred and imperfect impressions from the types.

The object I have in "iew is to overcome this objection in machines of the class referred to, and this I accomplish by providing means, acting independently of the operator, for with drawing the current from the type-wheel circuit and demagnetizing the pressmagnets of the printers as soon as the printing is acco1nplished.

A further object is to provide means for repeating the impression from any letter or figure as many times as desired, operative in connection with the other features of my invention.

In the accompanying drawings, forming a part hereof, Figure l is a view principally in diagram of apparatus embodying the inven tion, and Fig. 2 a view of a modified arrangement.

A is the transmitter key-board, having the usual letter and figure keys, a, and a repeating-key, b.

B is the sunflower of the transmitter, C the current-reversing cylinder, and D the stop-magnet. The sunflower and stoppingmagnet are in the transmitter-operating circuit l 2, extending from springcontacts 0 under keys at to the blocks of sunflower, and by a single return to the base of key-board. Circuit l 2 is supplied with currrent from a bat- (Xo model.)

tery, E, a dynamo-electric machine, or other source of electrical energy.

L is a type-wheel line extending from reversing-cylinder O to the several printers on theline, and including at each printer the typewheel escapement-magnets F G and the printing-magnet H. Magnet H is too sluggish to respond to the rapid reversals of current produced by cylinder C, which, however, operate the magnets FG; but when the transmitter is stopped the prolonged current of either polarity on line L energizes magnet Hand lifts the printing-lever, which, but for the devices about to be described,would remain elevated as long as the operatorcontinued to depress key, resulting in the objections before referred to.

Lil

To overcomethese objections, I provide a device which automatically, independent of the operator and at the proper time, throws asufficient resistance into line L,or opens such line or shunts its current to ground, so that the current will be withdrawn from the press-magnets H, and the printinglevers will be allowed to drop. To repeat, the repeating-keys act to restore the normal conditions which exist before the automatic device operates.

In transmitteroperating circuit 1 2 is also included an. electro-magnet, I, closing at the front point of its armature-lever a circuit, 3 4, supplied with current from battery K or other source of electrical energy. Circuit 3 4 in cludes a magnet, M, whose armature-lever at its back point short-circuits a resistance, R, in line L. XVhen transmitter is stopped, magnet I acts to close circuit 3 4, and then magnet M attracts its armature-lever, throwing resistanee It into line L. The interval before magnet M acts is sufficient to permit the pressmagnets of printers to act; but the throwing of resistance 1% into line L causes such a diminution in the current that the press-magnets are immediately demagnetized and the printing-levers drop. Circuit 3 4: may be opened at springcontacts (Z by the repeating-key I), (while key a is kept depressed,) so as to allow the resistance R to be cut out of circuit L, and the press-magnets to be again energized and to raise the printing-levers, so as to repeat a letter or figure one or more times. The resistance R is sufficient to withdraw practically all the current from line L, and the throwing of it into circuit is equivalent to opening the circuit, except that the resistance prevents an excessive spark at the back point of the armaturelever of magnet M. A condenser (shown in dotted lines in Fig. I) shunting the points would absorb the spark and answer the same purpose as the resistance, and hence might be substituted for it.

Instead of opening line L or throwing in resistance, the magnet M can be used to close a ground-connection, 5, at the front pointof its armature-lever, as shown in Fig. 2, such ground-connection being located between the reversing-cylinder of transmitter and the first printer on the line. This ground-connection, when closed, would shunt the current from the line to earth and accomplish the same end.

I am aware that a printing-circuit for that class of printing-telegraphs wherein the printing and type-wheel magnets are in separate circuits has been controlled by two relaymagnets, one of which acts to close the printing-circuit and the other to close a shunt around the first, such as described in patent of Field, No. 290,556.

What I claim is 1. In printing-telegraphs, the combination, with atransmitter and printers operated therefrom, of a type-wheel line including the escapementmagnets and the press-magnet of each printer and automatic means, substantially as described, acting independent of the transmitter-operator, to withdraw the current from the type-wheel line after the press-magnets have acted, for the purpose set forth.

2. In printing-telegraphs, the combination, with atransmitter and printers operated therefrom, of a type-wheel line including the escapement-magnets and the press-magnet of each printer, automatic means, substantially as described, acting independent of the transmitter-operator, to withdraw the current from the type-wheel line after the press-magnets have acted, and a repeating-key restoring the normal conditions of line, substantially as and for the purpose set forth.

3. In printing-telegraphs, the combination, with a transmitter and printers operated therefrom, having the type-wheel magnets and press-magnets in the same circuit, of a magnet controlled by the transmitter and acting to Withdraw the current from the said typewheel circuit after the press magnets have acted, substantially as set forth.

4. In printing-telegraphs, the combination, with a transmitter and printers operated therefrom, having the type-wheel magnets and press magnets in the same circuit, of a magnet con trolled by the transmitter and acting to withdraw the current from the said type-wheel circuit after the press-magnets have acted and a repeating-key independently controlling the said magnet, substantially as set forth.

5. In printing-telegraphs, the combination, with a transmitter and printers operated therefrom, having thetype wheel magnetsand pressmagnets in the same circuit, of a magnet in the transmitter-operating circuit controlling a second local circuit and a magnet in said second local circuit acting to withdraw the current from the said type-wheel circuit after the pressmagnets have acted, substantially as set forth.

6. In printing telegraphs, the combination, with atransmitter and printers operated there from, havingthe type-wheel magnetsand pressmagnets in the same circuit, of a magnet in the transxnitter-operating circuit controlling a second local circuit, a magnet in said second local circuit acting to withdraw the current from the said typewheel circuit after the press- Inagnets have acted, and a repeating-key independently controlling the said second local circuit, substantially as set forth.

This specification signed and witnessed this 23d day of January, 1886.

CLARENCE L. HEALY.

WVitnesses:

WM. 13. HERBERT, O. BLAUVELT. 

